JPS60191074A - Manufacture of inorganic cured body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to cement materials, which are added to systems such as ordinary Portland cement, blast furnace cement, and slag, taking into account the particle size distribution of reactivity. B. A method for producing an inorganic cured product that improves the mechanical properties of the product.

(Background Art) Various fillers have been added to a system in which lightweight aggregates are added to an inorganic hardened body with cement as a binder, and improvements in physical properties have been investigated. However, as such cured inorganic products have been used in various construction boards, it has become even more desirable to have improved mechanical properties.

(Objective of the Invention) The present invention was proposed in order to meet the above-mentioned demands, and an object of the present invention is to improve the specific strength of an inorganic cured product.

(Disclosure of the Invention) In order to achieve the above object, the present invention provides a method for producing a hardened material mainly composed of cement, with an average particle size of around 20 μm,
When using ordinary cement with a Blaine value of 2500 to 4ooo and around z/y, 2f! Using reactive fillers of class Ii or higher, the particle size distribution of each reactive filler is
The larger particle size is 10 μm to 100 μm or more, and the finer particle size is 90 or more in the range of 10 μm or less. The gist of the invention is a method for producing an inorganic hardened material, characterized in that the weight ratio of filler with a finer particle size is 5/1 to 2/1, and the blending ratio of cement is 30 inches or more of the total weight. It is something.

Next, the present invention will be explained in detail. It should be noted that the embodiments are merely illustrative, and it goes without saying that various changes and improvements can be made without departing from the spirit of the present invention.

The purpose of the present invention is to improve the specific strength by using a reactive filler as a filler and using two or more types of fillers with different particle size distributions in the production of cement-based hardened bodies when using ordinary cementora. That is.

As for cement, portland cement, blast furnace cement, slag, etc. are not particularly specified. Also, the Blaine value is around 3000 crnx/p (2500-4000c
rn2/y) may be used. In addition, the following reactive fillers are added.

(A) As a reactive filler with a large particle size, 10 to
90% or more in the range of 100 μm (2 or more types may be mixed as long as they are reactive) such as fly ash, clay, diatomaceous earth, etc. (B) 90% or more in the range of 10 μm or less ( (Two or more types may be mixed as long as they are reactive) For example, silicon dust, pulverized fly ash.

Silica powder, etc. (The mixing ratio of Shu and (B) is A/B = weight ratio)
If the overlapping distribution increases in the particle size range from s/l to 2/1, there will be no effect. Further, even if each of (A) and (B) is used alone, there is no great effect. Note that when the A/B ratio is 5/1 or more, there is no difference when using A alone, and when it is 2/1 or less, there is no difference when using B alone.

Note that it is also possible to add lightweight aggregates such as perlite and reinforcing fibers to the materials used. Additionally, a water reducing agent or the like may be added.

The mixing ratio of water to the solid content is preferably 30 parts or less, preferably 20 parts or less.

The blending ratio of cement is preferably 30 inches or more of the total weight,
If it is less than 30%, the bending strength decreases, which is not preferred in practice.

Further, the mixing of the materials is not limited to 4:J as long as they are mixed uniformly.

The molding method is not particularly limited, and may include casting, extrusion, roll molding, etc.

Curing is preferably carried out at a temperature of 50°C or higher, preferably 60°C or higher in a humid environment. This is to cause a pozzolanic reaction. (Curing for 4 weeks or more is preferable at room temperature) The period is 3 days or more, preferably 1 week or more. It is best to dry to the extent that free water evaporates.

Next, Table 1 shows the blending ratios of cement, large-grained reactive filler, small-grained reactive filler, and lightweight aggregate, and the resulting bending strength of the product.

That is, cement, reactive filler, and aggregate were blended in a predetermined amount and thoroughly mixed without adding water, and then a predetermined amount of water was gradually added and mixed.

(Using an omni mixer) Next, fill the mold with the mold and molding pressure 20 Kp/cm 2
Mold with. Pre-incubate at 20°Ox for 6 hours and then demold at 80°C.
It was cured for 120 hours and then dried at 60°Ox for 24 hours. The sample shape is 20mm thick, 401F-1 wide, 1mm long
It was set at 60.

The test used an autograph manufactured by Takasugi Seisakusho, and the strength of the songs was measured. The span was performed at xoCrnb head speed of O and Sn for 2 minutes.

FIG. 1 shows the relationship between high density and bending strength.

(Effects of the Invention) As described above, according to the present invention, by mixing a reactive filler with a large particle size and a reactive filler with a small particle size with cement, a young fruit that can improve the mechanical properties of a product is produced. It has the following. In addition, by blending the filler so that the particle size does not become ]f, it also has the effect of enabling close packing.

[Brief explanation of the drawing]

FIG. 1 shows the relationship between bulk density and curvature of products of the present invention and comparative examples and strength. Cow 1 Applicant Figure 1 I 1a L (f) [cl/ern3) Procedure? ...Justice and harm (voluntary) July 31, 1980 Manabu Shiga, Commissioner of the Patent Office1, Indication of the case 1982 Patent Application No. 476762, Title of invention Process for manufacturing inorganic cured product 3, Right to amend Relationship to the case Patent applicant name (583) Matsushita Electric Works Co., Ltd. 4, President 160 Address 2nd Mizota Building 7th floor 6, 7-5-10 Nishi-Shinjuku, Shinjuku-ku, Tokyo Statement of contents of amendment No. "Reactive particle size distribution" in the first line of page 2 is corrected to "Particle size distribution J of reactive filler."

Claims (1)

[Claims] In the production of hardened materials mainly composed of cement, particles with an average particle size of around 20 μm and a Blaine value of 2500 to 4000 (7
) When using ordinary cement around 2/f, two or more types of reactive fillers are used, and the particle size distribution of each reactive filler is 10 μm to 100 μm as the particle size of the larger one.
The weight of the filler with a larger particle size and the fin with a finer particle size, using fillers containing 90q6 or more in the μm range and 90% or more in the fine particle size of 10 μm or less. The ratio is 5/1 to 2/1,
A method for producing an inorganic hardened material, characterized in that the mixing ratio of cement is 30% or more of the total weight.